Ejector apparatus.



Patented Sept. 9, I902. I .M. T. DAVIDSON &-W. A D REWETT.

EJECTOB APPABATUS. (Application n1 Apr. 13, 1900.)

3- Sheets-$heef I.

(No Model.)

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No. 708,757. Patented Sept. 9,. I902. m. T. u vmson & w. A. DREWETT.EJECTOYB- APPARATUS.

I (Applicat ion med A r. 13, 1900. I J10 Model.) 1 7 3 Sheets-Sheet 2.

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NIL-708,757. I Patented Sept. 9. I902.

' M. T. DAVIDSON & w. A. DREWETT.

EJEGTOR APPARATUS.

- (Application. filed A r. 13, 1900.

(No Model.) 3 Sheets-Sheet 3.

. m: NORRIS Farms 00., Pucfuumm WASNINDTON. n. c.

UNITED STATES PATENT OFFICE."

MARSHALL T. DAVIDSON AND WILLIAM A. DREWETT, OF BROOKLYN,

- NEW YORK.

15.1 EOTOR APPARATUS.

SPECIFICATION forming part of Letters Patent No. 708,757, datedSeptember 9, 1902.

Application filed April 13,1900. serial M12366. (No model.) 7

T0 0% whom, it may concern.-

Be it known' that we, MARSHALL T. DAVID- SON and WILLIAM A. DREWETT,citizens of the United States, residing at Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulEjector Apparatus, of which the following is a specification.

Our invention relates to ejector apparatus whichis adapted for many andvarious uses, and more particularly as an ash-ejector for the holds ofvessels and the like; and the object of our invention is to provide animproved ejector apparatus which shall avoid the objectious to apparatusof this general sort and furnish a practical and efficientfmeans forejecting material of different kinds; and to these ends our inventionconsists in the various features of construction and arrangement ofparts having thegeneral mode of operation substantially as hereinaftermore particularly set forth. r

Referring to the accompanying drawings, wherein we have showna preferredembodiment of our invention which is adapted for use as an ash-ejectorfor vessels and als'o'for use for ejecting water therefrom, Figure, 1 isan elevation of the apparatus. Fig. 2 is aside view of the ejectorapparatus and discharge-- pipe arranged in,;the hull ofa vessel. Fig. 3

, is an enlarged sectional view of the ejector apparatus; and Fig. 4= isa side'view' of the same,-

showing a suction-pipe for lifting Water.

While ourinvention may be embodiedin difierent forms and structuresadapted for the particular purpose for which'it is intended, in theaccompanying drawings, wherein we have shown it as embodied in acombined ashand water ejector for usein vessels, it is provided with areceptacle A, comprising a hopper a, which is provided with a cover b,so connected, as by hinges, that it may be readily thrown open orclosedand locked, so as to tightly seal the hopper. Beneath the hop-.per Ct is the cylindrical or body portion B'of to draw the materialfrom the receptacle, being, as indicated, .arranged'at the delivery endof the receptacle, in front, so to speak, of the material deposited inthe receptacle, so that thelatter can flow by gravity to the ejector.This ejector proper may be variously constructed; but, as shown, itconsists of a nozzle, the central passage of which-communicates with thereceptacle and which is so constructed and arranged that an annularstream of fluid is delivered into the dischargeorifice, which annularstream tends to produce a vacuum in the receptacle and operates to drawor suck the material from the delivery end thereof in contradistinctionto driving it therefrom by'impact at the rear of the material, as hasheretofore been the practice. 2, the'fornier having the throat ofcentral passage andboth so arranged as to form an annular orifice 0 forthe delivery of the fluid, which fluid is contained'in an annularchamber to, surrounding 'the portions 1 and 2 of .thenozzleand suppliedwith fluid through a port :0, connected to some suitable source ofsupply, as by'means of a pipe 12, with the pump D, by means of which thefluid, as water, is delivered into the discharge orifice through theannular or ring shaped orifice 0 under pressure. 1

In order that the ashes or other material to be ejected maybe broughtinto a condition in v which they may properly be operated upon bytheejector, weprovide means for mixing a suitable amount of fiuid'withthe same, and, as shown, there is a nozzle .7 arranged in the front ofthe body portion B of the receptacle, which communicates through achannel 8 with the chamber to, so that the nozzle is supplied with fluidunder pressure, and a small stream of fluid will be ejected into thereceptacle in the rear of the material to be discharged, which will besuflicient to moisten or wet the material therein and render it in apractically semifluid State. In order'to further facilitate thisoperation and for' the further purpose of aiding the material to passthrough the hopper into the body portion of the receptacle and forclearing the hopper, we provide the hopper with one or more ports gwhich, as shown,are arranged in the up per portion thereof and connectthese ports through the medium of a pipe 9 with the source of supply offluid under pressure, and by this means the fluid is forced among thecontents of the hopper, which are thereby caused to flow readily intothe body portion of the receptacle.

Connected with the receptacle in any desired position, but, as shown,with the body portion B, is a valve-casing 5, having an inlet-valve 6,shown as spring-seated and acting as an air-induction valve to thereceptacle, but so arranged as to act as a check-valve and prevent thedelivery or escape of any material from the receptacle. The nozzle maybe connected with any suitable delivery device, and, as shown in Fig. 2,it is connected to the discharge-conduit or delivery-pipe E, having anopening orport in the side of a vessel above the water-line. In thepresent instance the receptacle is also provided with means forcommunicating with the hold of a vessel by means of a suction-pipe 15,constituting a separate branch conduit extending from the side of thehopper a, between the point where the ashes enter the receptacle and thewater-jet, downward to the hold or bilge of the vessel and having aproper valve.

Such being the general construction and arrangement of parts, the modeof operation will be largely understood from what has been stated; butwhen it is to be used-as, for instance, in the hold of a vessel-as anashejector the cover b is closed and secured to the hopper a and thepump D is set in operation. The first operation of the pump, whichshould be started slowly, is to supply fluid through the chamber to,which passes through the nozzle-orifice 0 and flows out through thereceptacle, filling the body portion B and the hopperaand delivery-pipeEwith fluid,unless the same are already filled from prior use. Thepressure on the water now being increased, as by the more rapidoperation of the pump, a flow or delivery of fluid through the pipe E isproduced, and when the fluid is under a proper pressure the flow of thefluid through the pipe E tends to cause a partial vacuum in thereceptacle and to draw the fluid therefrom,and the valve 6 thenautomatically opens, allowing air to flow into the receptacle andforcing the fluid through the ejector. The hopper and receptacle havingbeen practically emptied, the cover I) is now opened and the ashes orother material to be discharged are placed therein, where they mix withthe fluid entering through the ports y (when used) and fall into thebody B of the receptacle, where they are mixed with the fluid from thenozzle 7 and while in a practically semifluid state are sucked or drawnthrough the nozzle from the receptacle B and discharged through the pipeE. This operation can be continued indefinitely, and it will be seenthat by arranging the ejector at the rear of the receptacle, so that thefluid operates to draw or suck the material therefrom incontradistinction to driving it therefrom by impact in case of anyaccidental clogging or obstruction in the receptacle, the fluid will notflow back therein or overflow therefrom, as is common in theconstructions heretofore provided, but will continue to flow through thedelivery-pipe as before, and when the obstruction is removed-as, forinstance, when a clinker is broken upit will then be drawn through thenozzle and delivered as before. This feature is of great importance, asit avoids one of the principal objections to ejectors as heretoforeconstructed, wherein the ejecting fluid was delivered behind thematerial to be ejected, when if a stoppage occurs the fluid is deliveredinto the receptacle, causing an overflow. When the material to beejected has been exhausted, the cover b is tightly closed and the pumpstopped, and the fluid in the nozzle and rising or delivery pipe E flowsback into the receptacle to a greater or less extent, and the apparatusis ready to be operated again when occasion requires. It may be remarkedthat in the ordinary operation of the pump the water supplied to thepump is usually taken from the sea by means of a suitable connection.When it is desired to utilize the pump as an auxiliary bilge-pump andthe ejector as a bilge-water ejector, as in case of emergency, the pumpmay be arranged to take its water from the bilge,and the receptaclebeing closed, as above stated, the pump acts directly as an auxiliarybilge-pump, delivering the water from the bilge through the nozzle anddelivery-pipe E into the sea. The apparatus can then be utilized as anejector for the bilge-wa ter by opening the valve in the pipe 15, and inthis case the bilge-water will flow into the closed hopper a and besucked therefrom through the nozzle and delivered through the pipe E,and it will thus be seen that in this case the pump D not only acts asan auxiliary bilge-pump, but is caused also to operate the ejector,thereby largely increasing the delivery of the bilge-water from, thevessel, due not only to the direct action of the pump, but to theadditional ejector action of the apparatus.

What we claim is- 1. An ejector apparatus provided with anejector-nozzle and means for supplying fluid under pressure thereto, anda receptacle communicating with the nozzle and arranged to permit thecontents to pass by gravity to the rear end of the nozzle and means forsupplying fluid to mix with said contents, substantially as set forth.

2. An ejector apparatus includinga receptacle having a hopper for thesolid material to be ejected, and an ejector-nozzle havinga centralpassage communicating at its rear end with the receptacle and with asurrounding annular passage to deliver an annular stream of fluid intothe discharge orifice thereof, substantially as set forth.

3. The combination in an ejector apparatus of a receptacle and means forsupplying fluid thereto, an ejectorhaving a central passage arranged toreceive at the rear end the contents of the receptacle passing ,bygravity thereto, and a surrounding annular passage and means forsupplying the latter with fluid under pressure, substantially as setforth,

4. An ejector apparatus including a receptacle forthe material to beejected, an ejector-nozzle located at the delivery .end of the.

receptacle andbelow the top thereof to receive the material at the rearof then ozzle and constructed to deliver an annular stream of fluid intothe discharge-orifice, and meansfor supplying fluid thereto underpressure," substantially as described.

5. In an ejector apparatus, the combination with a receptacle comprisinga body portion and a hopper portion communicating therewith, ofan'ejector-nozzle located at the delivery end of thebody vportion of thereceptacle, means for supplying, fluid under pressure to the nozzle, andconnections forsupplying fluid to the body portion of the receptacle andto the hopper, substantially as described. V

(3. In an ejector apparatus, the combination with a receptaclecomprising a body portion and a hopper portion communicating therewith,of an ejector-nozzle located at the de-' livery end of the receptacleand provided with an annular orifice, a chamber communicating with saidorifice, means for supplying said chamber with fluid under pressure, andconnections from the chamber to the body portionand hopper portion ofthe receptacle for supplying a stream of fluid thereto, substantially asdescribed.

7. In combination with a vessel and with an ash-ejector of the typewherein ashes are ejected overboard by means of a water-jet traversing adischarge-conduit, a separate branch conduit adapted to deliverbilge-Water to thedischarge-conduit and communicating directly withthebilge of said vessel and with said discharge-conduit to deliverbilge-water to the same betweenthe' points of inlet to saiddischarge-conduit of the ashes and the waterjet,.substantiallyasdescribed.

8. In combinationwith a Vessel,a dischargeconduit leading overboard,means for produc. .in g a Water-jet directed outwardly through saidconduit,a supply-cond uit connecting said discharge-conduit with areceptacle for ashes,

and a separate conduit adapted to conduct bilge-Water to saiddischarge-00nd uit and contially as described.

heating with the bilge ofsaid vessel, substan- 9. Thecombinationwitlrthe-hopper and discharge-pipe of an ash-ejector, of-asource of fluid-supply to the ejector and means for connecting thehopper and discharge-pipe with the bilge independently of the saidsource of fluid-supply, substantially as set forth.

1.0. The combination with the hopper and discharge-pipe of anash-ejector, of-a pump adapted to pump Water from the bilge and force itthrough the ejector and dischargepipe, and an independent'connectionleading from the bilge to the hopper and dischargepipe and through whichwater may be sucked by the action of the ejector and discharged.

through said discharge-pipe, substantially as q I set forth.

In testimony whereof we have signed our names to this specification inthepresence of 3 two subscribing witnesses.

MARSHALL T. DAVIDSON.

WM. A. DREWETT. V

\Vitnesses: I JOHN LOWE,

WILLIAM C. NEWELL.

